Consider the path of a ray of light passing through a rectangular glass slab for different angles of incidence i)which one is greater ,angle of incidence or angle of refraction ? ii)what happens to the emergent angle on increasing the incident angle at interference? iii)State the conditions when no refraction occurs.
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(1) angle of incidence is greater.
(2) it will also increase.
(3) when ray of light passes through optic centre.
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Answer:
1 ) .
Both angles are equal to each others i.e. ∠i = ∠e.
2 ) .
Angle of emergence also increases.
3 ) .
The light ray falls along the normal or the refractive index of the two optical media are equal.
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